(Iowa)
Union Grove State Park is a 282-acre (114 ha) state park in Tama County, Iowa, United States, near the city of Gladbrook. The park, which was opened in 1938, is home to the 110-acre (45 ha) Union Grove Lake along with a dam and a waterfall. (Ref: https://en.wikipedia.org/wiki/Union_Grove_State_Park_(Iowa))